Looking Across Orientale
Explanation:
I can never get too much of Orientale. True, the wonderful Lunar Orbiter image
shows it more fully and at higher resolution than we see from Earth, but I love looking
across Mare Orientale and observing the Rook Mountains sticking into the black lunar
sky. Ninety degrees west longitude occurs at the crater Kopff (mouseover), and Paolo’s
great image – taken this January when the librations were especially favorable
– shows both the nearside and the farside (about 110 degrees longitude) arcs
of the Inner Rooks. The distant profiles reveal these basin ring mountains to have
considerable slopes, and while most are bulbous, some are pyramidal. Notice the monotonous
hue and relatively featureless surface outside the Cordillera and indeed outside
the Outer Rook Mountains. The material outside the Cordillera is thick ejecta deposits
that bury the diversity of the pre-Orientale topography. But the area between the
Outer Rook and the Cordillera has the same bland nature – it appears to also
be ejecta, but lacking the radial ridges and furrows.
—
Chuck
Wood
Technical Details:
Jan 1, 2005. Planewton DL-252 telescope + Lumenera LU075 M camera + Edmund Optics
R+IR filter; 700 of 4500 frames x 3 images.
Related Links:
Paolo’s Web Site
Rukl Plates 39, 50 & VII.
